1. Unit 9. Day 3.

2. Enlarge/Shrink
by a Scale Factor
Easy
&
Difficult

3. Scale
Factor
2:3

4. Enlarge/Shrink
by a Scale Factor
Easy
&
Difficult

5. 3:4 Scale Factor 3 𝑠 2 𝑠 = 3 𝑠 4 𝑙 = 𝑠 𝑙 4 4 𝑙 𝑥 𝑙 𝑥 3𝑥 = 8 3𝑥 = 16 3
3 𝑠 4 𝑙 = 𝑠 𝑙 4 4 𝑙 𝑥 𝑙 𝑥 3𝑥 = 8 3𝑥 = 16 3 3 3 3
8 3
2 2 3
16 3
5 1 3 𝑥 = = 𝑥 = =
Constant of Proportionality
Scale
Factor
3:4

6. 4:9 Scale Factor 4 𝑠 1 𝑠 4 𝑠 9 𝑙 = 𝑠 𝑙 2 = 9 𝑙 𝑥 𝑙 𝑥 4𝑥 = 18 4𝑥 = 9 4
4 𝑠 9 𝑙 = 𝑠 𝑙 2 = 9 𝑙 𝑥 𝑙 𝑥 4𝑥 = 18 4𝑥 = 9 4 4 4 4
18 4
4 1 2
9 4
2 1 4 𝑥 = = 𝑥 = =
Constant of Proportionality
Scale
Factor
4:9

7. 8:5 Scale Factor 8 𝑙 3 𝑙 8 𝑙 5 𝑠 = 𝑙 𝑠 6 8 𝑙 5 𝑠 = 𝑙 𝑠 = 5 5 𝑠 𝑥 𝑠 𝑥 𝑥
8 𝑙 5 𝑠 = 𝑙 𝑠 6
8 𝑙 5 𝑠 = 𝑙 𝑠 = 5 5 𝑠 𝑥 𝑠 𝑥 𝑥 8𝑥 = 30 8𝑥 = 25 8𝑥 = 15 8 8 8 8 8 8
30 8
3 3 4
25 8
3 1 8
15 8
1 7 8 𝑥 = = = 𝑥 = = 𝑥 =
Constant of Proportionality
Scale
Factor
8:5